Bushing.



` combination of parts as hereinafter set forth.`

UNITED 'STATES- Patented March 15, 1904.

PATENT OFFICE.

BUSHING.

SPECIFICATION forming part of Letters Patent No. 754,512, dated March15, 1904.

Application iled February 26, 1903. Serial No. 145,252. (No model.)

To all whom t may concern:

Be it known that we, GUsTAvE STREHL and JOHN STREHL, citizens of theUnited States, and residents of La Crosse, in the county of La Orosseand State of Wisconsin, have made a certain new and useful Invention inBushings; and we declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artto which it appertains to make and use the invention, reference beinghad to the accompanying drawings, and to letters of reference markedthereon, which form a part of this-specification.

f Figure l is a sectional view showing the inner or bushing seat-sectionin position and the engaged .screw-wrench. Fig. 2 is a sectional view oftheinner or bushing seat-section. Fig. 3 is a sectional view showingboth parts of the bushing in position. Fig. 4: is a sectional view ofthe outer section. Fig. 5 is a side view of the inner or bushingseat-section.

, The invention relates to metal bushings for barrels, casks, and kegs,chiefly such as are used for holding ale or beer; and the inventionconsists in the novel construction and The object of the invention is tosupply a strong and secure bushing which willpresent both on the outsideand on the inside of the keg a smooth finish, the ianges requiring noprojections, lugs, or recesses such as are made in ordinary metalbushings for use in screwing them into place.

In the accompanying drawings the letter a designates the wall of abarrel or keg having the bung-hole Z2, the surface of which is usuf allymade slightly tapering from the inside of the barrel-wall outward.

The metal bushing is made in two sectionsthe inner section or annularbushing-seat c and the outer section d. Each of these sections isprovided with a smooth circular rimflange e at its exposed end, thisflange being beveled or rounded o at its periphery. The outerbushing-section d is designed to screw into the inner bushing section orseat c and is therefore threaded around its exterior wall,

as at f, to engage the inner thread g of the bushing seat-section. Theaperture t of this drawings.

bushing-section 0l is finished in the usual smooth tapering manner, asindicated in the The inner or bushing seat-section cis designed toengage the hole b in the wall of the barrel in a secure and tight mannerand is provided with a rim-iiange which engages the interior of thebarrel-wall around the hole. This iiange is usually provided with anunder bevel or swell le, surrounding the neck or threaded portion inorder that when screwed into the hole Z2 this part will be forced intothe wood of the barrel-wall at the margin of the hole in such wise as tomake a tight joint on the inside of the barrel. This bushing-seat isdesigned to be screwed into the hole b and is provided with an exteriorsharp thread l of coarse pitch, which will forcibly engage the wall ofthe barrel-hole I) when turned with a suitable wrench and will form asecure connection with the wooden seat provided by this hole. Usuallythe turns of the sharp thread are separated by a broad thread bottom m,which is designed to receive and engage the fibers of the wood,`compressing the same without breaking them, so that the liability ofleakage through the thread is reducedto a minimum. The interior of thebushing-seat c is provided w-ith a thread g to receive the thread of theouter Vbushing-section 0l. This thread usually terminates short of theouter edge p of the bushing-seat, and an interior annular rabbetedbearing or bevelshoulder s is provided in this end of ,the bushing-seatto receive the bearing ,of a screwwrench w, which is employed to turnthe bushing-seat home. With this object in view the inner thread g,which is engaged by the holding-thread of the screw-wrench, has the samedirection of inclination as the outer sharp thread Z, the latter,however, being, as hereinbefore indicated, a quick thread of coarsepitch. When the bushing-seat is properly engaged by the screw-wrench, itbecomes practically solid therewith, and by its means the bushing-seatcan be forcibly turned into the hole of the barrel, so as to engage thewooden bearing-wall of said hole in a secure and tight manner. Thescrew-wrench being removed, the outer bushing, having a line thread, canthen be easily engaged with the bushing-seat.

Having described this invention, what we claim, and desire to secure byLetters Patent,-

derbeveled rim-fiange and inner underbeveled rim-ange being adapted toforcibly engage respectively the outer and inner walls of I5 a stave inwhich the bushing is seated, substantially as specified.

In testimony whereof we aflix our signatures in presence of twowitnesses.

A GUSTAVE STREHL.

JOHN STREHL. Witnesses:

W. J. HIGKISCH, GEO. J. FRIES.

